Nieto A, Cobeta I, Gamboa F J, Montojo J, Vegas A
Servicio de ORL, Hospital Príncipe de Asturias, Universidad de Alcalá de Henares, Madrid.
Acta Otorrinolaringol Esp. 1996 Sep-Oct;47(5):370-6.
Vocal abuse lesions disturb voice production by increasing the presence of noise in the voice. The harmonic-to-noise ratio (H/N) and spectrography are two different ways to evaluate noise components in the voice. A study was made of 52 patients (32 polyps, 11 Reinke's edema and 9 nodules) who underwent microlaryngeal phonosurgery. The grade of glottic closure was determined by stroboscopy; H/N and the long-term average spectrum (LTAS) at low-frequency (0-2000 Hz) were measured with a CSL-4300 instrument. Stroboscopy and acoustic analysis were made before surgery and two week and one month after surgery. Before surgery, the LTAS revealed weak harmonics, as shown by H/N values. After surgery, H/N values and harmonic energy increased. Preoperative and postoperative differences were significant (p < 0.05). Improved glottic closure after surgery improved the acoustic parameters.
发声滥用性病变通过增加嗓音中的噪音成分来干扰发声。谐波噪声比（H/N）和声谱分析是评估嗓音中噪音成分的两种不同方法。对52例接受显微喉镜嗓音手术的患者（32例息肉、11例任克氏水肿和9例小结节）进行了一项研究。通过频闪喉镜检查确定声门闭合程度；使用CSL - 4300仪器测量低频（0 - 2000 Hz）下的H/N和长期平均谱（LTAS）。在手术前、术后两周和术后一个月进行频闪喉镜检查和声学分析。手术前，LTAS显示谐波微弱，H/N值也表明了这一点。手术后，H/N值和谐波能量增加。术前和术后差异具有显著性（p < 0.05）。手术后声门闭合改善，声学参数也得到改善。
